Presentation on theme: "What is Ecology ? The study of how organisms interact with one another and their non-living environment."— Presentation transcript:
1What is Ecology ?The study of how organisms interact with one another and their non-living environment
2So Then What is an Ecosystem ? BiosphereEcosystemsCommunitiesPopulationsOrganismsAn ecosystem is how all of the living and non-living things interact together in an area.
3So Then What is an Ecosystem ? BiosphereEcosystemsCommunitiesPopulationsOrganismsLooking at the chart to the right..Our BIOSPHERE is the part of the Earth where the organisms existAnd an ECOSYSTEM is that area where the living and non-living things interact.
4Energy for the Ecosystems A. Every ecosystem on Earth gets its energy from the same source:SUNLIGHT!!!
5ProducersOrganisms that can use sunlight or chemical energy to produce food are called: autotrophs
6ProducersPhotosynthesis: most common, uses energy from sunlight to make foodExample: Plants, sea weed, algae
7ProducersChemosynthesis: uses energy form inorganic chemical compounds to make foodExample: Sulfur bacteria in Yellowstone hot springs & deep sea hydrothermal vents
8Producers Autotrophs are also called producers Producers/Autotrophs: use energy to build complex organic molecules out of inorganic molecules
9ProducersDescribe the flow of energy through an ecosystem: It goes in one direction from sun producers consumers
10An ecosystem contains BIOTIC (living) and ABIOTIC (non-living) things Parts of an EcosystemAn ecosystem contains BIOTIC (living) and ABIOTIC (non-living) thingsExamples of BIOTIC things:• Plants• Animals• Fungi• Bacteria
11Parts of an Ecosystem Examples of ABIOTIC things are: • Water • Air An Ecosystem is made of BIOTIC and ABIOTIC ComponentsABIOTIC components are the NON-living parts of the ecosystemExamples of ABIOTIC things are:• Water• Air• Temperature• Sunlight
12Food ChainA Food Chain tells us what eats what in an ecosystem. It shows the series of organisms through which food energy is passed.
13Food Chain What is happening in this food chain? The insect is eaten by the frog
14Food Chain What does the insect eat? Many insects eat the nectar from flowers
16Food Chain What does this entire food chain show? 1) The slug eats the plant2) The frog eats the slug3) The heron eats the frog
17Food Chain The arrow means “is eaten by” In this case the dragonfly is eaten by the frog.
18Food Chain Remember… ALL food chains begin with a Producer ( Also known as an Autotroph)
19Food Web In an ecosystem, there are many producers and consumers. Instead of a food chain, we can use a food web.
20Food WebHumansBlue whaleSperm whaleCrabeater sealKillerwhaleElephantsealLeopardAdéliepenguinsPetrelFishSquidCarnivorous planktonKrillPhytoplanktonHerbivorouszooplanktonEmperorpenguinA food web shows the complex relationship formed by the overlapping and interconnecting food chains.
21Energy Pyramid Steps in a food chain are called: Trophic Levels. A Trophic Level is a level of nourishment in a food chain.
22Energy Pyramid The pyramid first shows us the Producers. Remember… Producers get their energy from the sun.Producers are the first and largest Trophic Level.Producers
23Energy Pyramid Second, we see the Primary Consumers The Primary Consumers get their energy from eating the Producers.Primary Consumers can be either Herbivores or Omnivores.Primary Consumers
24Energy Pyramid Third, we see the Secondary Consumers The Secondary Consumers get their energy from eating the Primary ConsumersSecondary Consumers are Carnivores or OmnivoresSecondary Consumers
25Energy Pyramid Fourth, we see the Tertiary Consumers The Tertiary Consumers get their energy from eating the Secondary ConsumersTertiary Consumers are Carnivores or OmnivoresTertiary Consumers
26Some energy pyramids can have a fifth Trophic Level.
27Primary ProducersProducers make their own food, from abiotic factors, such as sunlight or heat from chemical reactions.
28Producers are also known as Autotrophs Primary ProducersProducers are also known as AutotrophsSome examples are:• Plants• Algae• Bacteria
29ConsumersConsumers are organisms that get their energy by eating other organisms
30Consumers are also known as Heterotrophs Consumers can be:• Herbivores• Carnivores• Omnivores• Detritivores (Decomposers)
31Consumers Herbivores eat only plants. Herbivores are also known as Heterotrophs or Primary ConsumersHerbivore Examples:• Large Mammals (Such as cattle & deer)• Insects
32Carnivores eat other animals ConsumersCarnivores eat other animalsCarnivores are also known as Heterotrophs or Secondary or Tertiary ConsumersCarnivore Examples:• Lions, Tigers• Wolves• Sharks• Snakes
33Consumers Omnivores eat both plants and animals Omnivores are also known as Heterotrophs or ConsumersOmnivore Examples:• Humans• Bears• Mice• Pigs
34Detritivores convert waste into nutrients (also called decomposers) ConsumersDetritivores convert waste into nutrients (also called decomposers)Detritivore Examples:• Worms• Beetles• Bacteria• Fungi
35ConsumersScavengers break down dead plants and animals (also called heterotroph, consumer)Scavenger Examples:• Vulture• Crow• Hyena
36Let’s look at the energy pyramid closer. Energy pyramids: Are a way to graph how much energy is passed up the food chain from one organism to the next
37Energy Pyramid Let’s look at the energy pyramid closer. Only 10% of the energy from the prior trophic level is passed on.This is because energy is lost to the environment as heat
39Energy PyramidIf an energy pyramid consists of plants that contain 500,000 calories of food energy, how many calories of energy would be available to consumers at each of the next three trophic levels?Trophic levelPrimary producersTertiary consumersSecondary consumersPrimary consumers
40Energy Pyramid Primary Consumers: Secondary Consumers: 500,000 cal x .1 = 50,000 caloriesSecondary Consumers:50,000 cal x .1 = 5,000 caloriesTertiary Consumers:5,000 cal x .1 = 500 caloriesTrophic levelPrimary producersTertiary consumersSecondary consumersPrimary consumers
41What does these energy numbers tell us?? Food WebWhat does these energy numbers tell us??There are very few Tertiary consumers, because it takes a HUGE amount of food energy to support them.For a large population to exist, it needs to feed from the LOWEST trophic level possible, because there is more food energy available.Trophic levelPrimary producersTertiary consumersSecondary consumersPrimary consumers
42Besides the energy pyramid, we can also have pyramids of: Other Pyramid typesBesides the energy pyramid, we can also have pyramids of:NumbersBiomass
43Represents the amount of living organic matter at each trophic level. Biomass PyramidRepresents the amount of living organic matter at each trophic level.
44Pyramid of NumbersShows the relative number of individual organisms at each trophic level.
46Pyramid of NumbersA pyramid of numbers reflects the number of species at each trophic level.For example: if we look at a forest, there may be few rose bushes, but many insects that feed on the rose bushes, with a pyramid like the one below.
47For example: Looking at the same forest, the biomass is great. Pyramid of BiomassA pyramid of biomass reflects the total amount of living tissue at each trophic level.For example: Looking at the same forest, the biomass is great.
48Sequoia National Park Sequoia Trees Skunks Gray Squirrels Beetles Peregrine FalconsMiceGreat Gray OwlRed tail foxCaterpillarsBatsFence lizardsGrizzly BearBullfrogsFliesCalifornia NewtMountain lions